Operating tool for high tension electric lines



J'uly 28, 1942. D. C. HUBBRD 2 OPERATING Tool. FOR lHIGH TENsioNELECTRIC -LINES.

Filed Aug. 13, 1.941

2 Sheets-'Sheet 1 July 2s, 1942. 2,291,593 OPERATING TOOL FORII-IGl-I'TENSION` ELECTRIC LINES D. c. HUBBARD Filed Aug. 13, 1941 2Sheets-Shea?I 2 Patented July 128, `1942 OPERATING TOOL FOB BEIGETENSION ELECTRIC LINES David C. Hubbard, Centralia, Mo., assigner to A.B. Chance Company, Centralia, Mo., a corporation o! Missouri ApplicationAugust 13, 1941, Serial No. 406,665

11 Claims. ('Cl. 294-19) The present invention relates to operatingtools for high tension electric lines, and is particularly concernedwith telescoping insulating sticks adapted to be used for supportingdisconnects and various other types of tools or for use in measuringdistances. x

One of the objects of the invention is the provision of an improvedtelescoping disconnect stick I which is adapted to be used for handlingblade disconnects or fused cutouts of any style, and which is of lightweight and collapsible, to be packed in a very limited space.

Another object of the invention is the provision of an improvedtelescoping insulating stick ofthe class described, which has ahighmechanical and dielectric strength, a low moisture absorption, andwhich is adequately insulated so that it may be used on high tensioncircuits.

Another object of the invention is the provision of an improvedtelescoping insulating stick having an improved latching arrangement,all of the exposed parts of which may be made of insulating materials,and by means of which any or all of the sections may be latched in theextended' position.

Another object of the invention is the provision of an improvedtelescoping insulating stick which is provided with an improvedstructure for preventing rotative motion between the various sections ofthe stick so that it may be used for exerting a relatively strongtorque.

Another object of the invention is the provision of improved forms oflatching mechanism vention,v embodied in a disconnect stick, with itsparts in collapsed position;

Fig. 2 is a side elevational view of the same disconnect stick, with thesections fully extended;

Fig. 3 is a transverse sectional view, taken on a plane passing throughthe axis of the stick and through the axes of the latches, showing thedetails of construction of the invention;

Fig. iis a transverse sectional view, taken on the plane of the line-4 4of Fig. 3;

Fig.v 5 is a fragmentary sectional view, taken on the same plane as Fig.3, with the interlocking sleeves of two sections shown in elevation;

Fig. 6 is a transverse sectional View, taken on the plane of the line6-6 of Fig. 5, looking in the direction of the arrows;

Fig. 'I is a fragmentary elevational view in partial sectiOn, showing analternative form of head for the stick;

for telescoping disconnect sticks or tools by means of which thesections may be secured in extended position or they may be collapsed atwill.

Another object of the invention is the provision of an improvedtelescoping insulating stick adapted to be used for measuring the heightor spacing of conductors.

Another object of the invention is the provision of an improvedtelescoping insulating stick adapted to be used with a universal' headso that it is available for connection to a multiplicity of diierenttypes of tools and which is also provided `with automatic latching meansfor latching the sections in extended position.

` Other objects of the invention will be apparent fromthe followingdescription and the accompanying drawings, in which similar charactersof reference indicate similar parts throughout the several views. f

Referring to the 'two sheets of drawings,

Fig 1 is an elevational view of the telescoping insulating stickconstructed according to the in- Fig. 8 is an elevational viewsimilar'to Fig. v'7, showing a similar stick provided with a universalhead for attachment to various dierent types of tools and at variousangles; Fig. 9 isa view similar to Fig. 1 of a modication comprising amultiplicity of extensible sections in a stick of the class adapted tobe used for measuring the length of conductors;

Fig. 10 is a fragmentary longitudinal sectional view of another form oflatching mechanism adapted tobe used in the embodiments of Fig. 1 l

or Fig. 8;

Fig. 11 is a transverse sectional view, taken on the plane of the linelI-ll of Fig. 10, looking in the direction of the arrows;

Fig. 12 is a sectional view taken on the line I2'|2 of Fig. l0, lookingin the direction of the arrows;

Fig. 13 is a fragmentary elevational view of one l of the Joints ofthetype utilized in the insulating sticks vof Fig. 9 which are, alsoillustrated in'section in Fig. 10.

. Referring to Figs. 1 to 3, 20 indicates in its entirety the tool shownin this embodiment of the invention; comprising a disconnect stick. This`disconnect stick includes the three sections 2l, 22, and 23; but itshould be understood that any number of sections of similarlconstruction may be included, and the length is limited only by thestrength of the materials used, and the size of the largest section,which is preferably of 'suitable size to be used as a handle.

The disconnect stick is shown in extended position in Flg.- 2, andcollapsed or partially collapsed in Fis. 1.

The sections 2l-23 are allpreferably made of insulating material, therebeing no metal cept the metal iltting at the end. and the metal springsused in the latches of this embodiment.

I'he tubing is preferably a canvas base, laminated plastic tubing,having a low rate of moisture absorption and a high mechanical strength.In some embodiments of the invention the tubing may comprise tubes; ofindurated iiben 'I'he section 23 ing tube 24 of suitable length to formone Section of the stick, and at its lower end this tube is preferablyprovided with an insulating closure 25, such as a wooden plug, having areduced cylindrical portion 25 fitting in the tube, and having anannular shoulder 21 fitting against the end of the tube.

The plug 25 may have its external'surface 29 of partially sphericalform, and it may have a tight frictional Vllt in the end of the tube 24,and may be secured in addition by means of an insulating pin 29 driveninto an aperture in preferably comprises an insulatthe plug andapertures in the walls of the tube 24.

The hole 30 in the tube 24 is for the admission or egress of air duringthe extension or collapse of the sectional stick. The break 3| in thetube indicates that the tube is of greater length than that shown in`the drawings (Fig. 3) and the length of one section is determined by theconvenient length for the collapsed stick, which should preferably besuch that the stick can be carried behind the seat of a small businesscoupe or in theA trunk of an automobile.

At its opposite end, `that is, the left end of the tube 24 in Fig. 3,this tube is provided with an interlocking sleeve 32, which may consistof a short length of tube of the same material, having its left end cut01T squarely and its right end formed with two squarely cut portions 33,34, separated by two axially extending shoulders 35.

This is best illustrated in Fig. 5, Where the interlocking sleeve 32 isseen in partial elevation. The interlocking sleeve 32 is fixedly securedto the tube 24 by means of a plurality of transverse pins 36, which havea tight frictional t in a suitable aperture 31 in the tube 24 and sleeve32.

In addition, the sleeve 32 may have a tight frictional fit inside thetube 24, where it is secured with the ends of the sleeve and tube ilushat the right end of the sleeve 23. section 22 preferably comprisesanother insulating tube 38 of the same material and a size that it has asliding movement inside the sleeve 32.

The tube 38 is provided on its right end, lthat is, the end which islocated in the section 23, with an interlocking sleeve 39, shown inpartial elevation in Fig. 5.

Interlocking sleeve 39 comprises an insulating sleeve, which may be ofthe same material as the tubes 24, 38, 32, and it is secured on theright end of the tube 38 (Fig. 3) with which it has a tight frictionalt.

The right end of this interlocking sleeve 39 may again be cut oil?squarely, but its left end is provided with two squarely cut portions,indicated at 49, 4|, separated by two axially extending shoulders 42.

The offset between the surfaces 40 and 4| is the same as that betweenthe surfaces 33 and 34 of the interlocking sleeve 32. The sleeve 39 Thenext of such I may be further flxedly secured to the tube 38 l ,verselyextending tube 41 1 32 and 39, so

turesin the tube 33, sleeve 39, and in a cylindrical wooden plug 44. Allof these parts preferably have a tight frictional it with each other.

It will be apparent -that when the tube 33 has a proper rotationalposition with respect to the tube 24, the sleeves 32 and 39 maybeybrought into interlocking relation with each other so that the axialshoulders 35 engage the axial shoulders 42 and rotation is preventedbetween these tubes 39 and 24.

I'he wooden plug 44 in the section 22 is preferably of sufficient lengthto 'extend from the right end of the interlocking sleeve 39 beyond theinterlocking sleeve 32 of the section 23 so that itmay also provide asupport for a latching member 45, shown in Eig. 3 as a spring pressedplunger. M

At a point Just beyond the end of the tube 24 of the first section 23,when thesecond section 22 is fully extended and the interlockingshoulders 35 and 42 are engaging each other, the tube 38 and plug 44 areprovided with a through bore 46. Wherever transverse pins, frietionallysecured in apertures, are described. pins, rivets or screws may beemployed.

This through bore may `be lined with a transof the same insulatingmaterial as the tubes 24 and 39, and tube 41 comprises a guide for theplungers 45. 49.

These plungers or latching members may be identical in construction, andeach preferably comprises a substantially cylindrical insulating member45, 48 lof ber, Bakelite,A or wood, having a sliding fit in the tube 41.One corner of each of these latches or dogs 45, 49 is preferably beveledas at 49 sulciently so that the beveled camming surface 49 will engagethe inside of the interlocking sleeve 32 and cam the plungers inwardlywhen the plungers are disposed in the tube 24 beyond the sleeve 32.

In order to limit the outward movement of the dogs 45, 49, they arepreferably provided with through bores 50 extending at right angles tothe axis and located near the inner end for receiving the cylindricalinsulating pin 5|,.which has a tight frictional fit in the 'bore 50.

The pin 5| is of sufficient length to extend into the slot 52 in one orboth sides of the tube 41, in which th'e pin is slidably mounted formovement w1th the plunger. 'I'he pins 5| prevent rotation of theplungers, and they are so located that the beveled surface 49 is locatedjust outside the tube 39.

The two plungers vv45, 48 may be outwardly pressed by means of a helicalcoil spring 53 located in the tube 41. This is the only part oi' thelatching assembly which is made`of metal. The compression spring 53 maybe made of any suitable material, such' as spring wire, brass, orbronze, or steel. At its opposite end, that is, the left end in Fig. 3,the section 22 is similar in construction to the same end of the section23, previously described.

The other section 22 has an interlocking sleeve 32 fixed in the tube 39to engage the interlocking sleeve 39 carried yby the tube 54 of section2|.

Section 2| has its right end of a construction which is exactly similarto the right end of the section 22, except that the tube 54 is' ofsmaller proportions, and so are th'e interlocking sleeves that tube 54slides inside the interlocking sleeve 32 of tube 39. In the same way thetubularguide 48 of section 2| is be shorter,

`41 for the latching dogs 45,

-54 and plug 55.` `prises -a substantially cyhndrical pin,providedparts'svrnaller, so thatit may slide in thenext bigger.section.' Y

As previously stated, any number of sections.

may be employed. The endrnost section 2| may have the open end of itstube 54 closed by an insulating plug' 55 of wood or other suitableinsulating matriel, such as fiber, or amoided phenolic condensationcompound, such as Bake- 1ite."

This insulating. plug has a cylindrical. portion 56, which itsinside thetube 54, and has an annular shoulder engaging the end of the tube.Theouter end 58 of the plug 55 may be partially spherical, and theplirghas a frictional t in the tube 54'.

It is, however, vpreferably secured in place'by means of the disconnect,pin 5 9, Which passes through the through bores 60 in the tube Thedisconnect pin 59 comwith a .cylindrical head 6I carried by thecylindrical shank 62. The pin is preferably canvas basephenolicmaterial.

f -The head 6l may be chamfered at .63', giving it a tapered outermostportion, which is more easily inserted -into an aperture of fa .cover ora disconnect.v The .shank 62 is secured in the bore 60 by means of atransverse pin- 64, which may be 'off insulating fiber or metal, andthe, transf pin '64; hasjartight frictional fit .in the dis- Refer-ringto'Fg: 7, this-is a fragmentary ele- 1 vaticani viewf v of head fortheend ofthe tool. In this case the .end assembly comprises a metal member65, hav

in partial sectionof another form ing a cylindrical portion 66 fittingin the. end of the tube 54, and having an annular shoulder 61:

engaging the end. The .cylindrical portion 66 'is secured m place by` a;transverse headless rivet 68, which passes I through. the cylindricalportion 66 and. tube 54.

The fittingv65 has a cylindrical shank 69 .provided with a conicallypointed end portionl. The cylindrical shank 10' has a transverselyextending arm 1I at right angles to the shank 69,

and preferably of smaller size, and the arm 1I j 11 for receiving thewing nut 18. The face 19 c of the universal head 80 toward the head ofthe .3 shank 66v 'of cylindrical shape adapted'to fit in a tube 54,andwith an annular shoulder .61 so that 'itis secured to the stick inthe same Amanner'v as `shown in Fig. 7.

The4 universal head has la substantially circular ange 16 carried lbythe shank 6 6, and having a centrally located threaded through aperturebolt 18 is provided with a plurality of regularly spaced lugs 8l.arranged in a circle and separated by slots of the same width as thelugs 8l. Thus -this universal head is adapted to be attached to any of amultiplicity of tools, with the tool at various angles', the tool havinga circular fiange similar to the ange 16, except that it has a slotinstead ofv anaperture 11.'

The -wing nut 18 and lugs 8| serve to secure the tool in any ofa'plurality. of angular positions. l-

Among'the. tools which may be used on the end of a stick provided withsuch a universal head are clamp stick heads, wrenches, wire tong heads,tie stick heads, fork heads, ratchet wrench heads, cotter key removerland replacer, cotter key puller,.locating pins, chuck blanks, fusepullmay `be tapered toward itsouter end portion,`

Where-it is provided with a circular head 12. The circularhead has anabrupt shoulder 13 on its inner side, and it is tapered around itat 14,near its outer face 15.

The taperedbr rounded surface 14 is adapted to facilitate the entry ofthe head 12 into a hole in a cover or disconnect. The abrupt shoulder 13is adapted to retain the-arm 1| in such a hole.

The axially extending shank 69 in combination with the transverse arm.1I is useful in pushing members connected with a transmission line, andthe tapered or conical point. 10 serves to permit the shank 69 to Vbeinserted in apertures more readily.

.In addition to the tight frictional fit between the closure plugs,rivet pins, interlocking sleeves,

and tubes, these members'may be cemented in extended length of thestick.

place wherever they are supposed-to bev xedly secured to another member.

It should be understood that wherever a tight frictional fit isspecified forA fixed' securement,

cement may also be employed-and the cement is preferably of aninsulatingcharacter.

ers, screw drivers, insulation knife, paint brushes.

insulator brushes, Ifolding rules, bolt headers, ball mirrors, hacksaws, pruning'.

socket adjusters',v

saws,etc. v

Referring to Fig, 9, thisisan elevational view similar to Fig.v 1 ofameasuring stickoffsimilar construction, having its sections made of aplu-r rality of telescoping-tubes, according tothe con? structionshownin Fig. 3 or l0. For example, such a measuring stick, includingnine sections,

-each of which extends to about three feet, makes a 27 ft. insulatingrod for measuring conductor heights. The sections can be provided withfoot and inch markings', printed or painted on the sections, but thetubes are preferably not weakened by any marking grooves, since thatwould have an undesirable` weakening effect on the. stick .whenextended. v

Such a measuring stick will readily indicate the length by the extensionof a predetermined number of its sections and the distance .between theend of a multiplicity of extended sectionsv and the conductor to bemeasured, can readily be determined by the use of a rule, and added tothe Referring to Fig. 10,v this is ausectional view, showing anotherform of latching mechanism for extensible Sticks of the type shown inFig. l or Fig. 9.

In this' casethe. same latching mechanism may be used at the jointsbetween all of the various sections. The ends of the endmost sectionsmay beclosed by means vof an insulating plug similar to that shown at25v in Fig. 3.

The sections are made ofinsulating tubes of the same material,previously described, and each successive section is made of tubes ofthe next smaller size, adapted to slide or telescope into the precedingsection. v

As all of the joints and latching mechanisms are similar, only one 'needbe described in detail.'

In Fig. 10, 82 indicates the en d of the. larger of vReferring to Fig.8, this vis a view similar to Y.

Fig. '1, showing a universal head'for use on the insulating stick ofFignlfor Fig. 9. This universal head is of the type having a securingtwo sections, and 83 indicates the adj'acent end of thesmaller of twosections.

f T he insulating tube a3 is.-c1os`ed by eens of an insulatingcylindrical wooden plug 84, having a tight frictional iitin the end ofthe tube 83, and also secured'iby means of a transverse insulatingmented in place.

' chute 98.

' ing button 89, the button to prevent relative rotation between -fortools of var ious types.

pin 85. Both the pin 85 and plug 84 may be ce- At a point spaced fromthe end of the tube 83, the plug 84 is provided with a transversecylindrical bore 86, and the tube 83 is provided with a smallercounterbore 81. 'I'he counter-bore 81 is adapted to receive thecylindrical body 88 of alatching button 89. A circular head 98 on thelatching button 89 is received in the bore 88, and the head limits theoutward movement of the button.

A helical'compression spring 9| is located in the bore 86 and engagesthe heads 9| of two of the buttons 89, to urge them outward. Each button89 preferably has the end of its body 88 pro,-

' vided with a rounded, tapered, or partially spherical surface 92, toaid in bringing about the retraction of the button by camming action.

The larger tube 82 is provided on its end, surrounding the. tube 83,with a cylindrical ferrule 93 of the same insulating material, having atight frictional ilt about the tube 82 and secured in place by cementand by means of a plurality of through pins 9| of insulating material.

Theferrule 93 has a radially inwardly extending annular flange 95, whichis provided with a circular aperture 96 tube 83.

'Ihe ange 95 is spaced from the end surface 91 of the t`ube 82suiliciently to provide space for the latching button or pin 89.

, At two diametrically opposite points the insulating tube 82 isprovided with the tapered slots k98, adapted to engage the rounded end92 of the latching button 89 and to cam the button inward when thebuttons are in registry with the slots 98 and the two each other in suchmanner as to telescope the section 83 into section 82.

In some embodiments of the invention the space between the end 91`andilan'ge 95 may be an annular groove so that the sections are not securedagainst rotation relative to each other, but are'secured againstcollapse when each latching button 89 is rotated away from its releaseIn other embodiments of the invention the inner tube 82 may have axiallyextending shoulders in the annular groove which receives the latchtheannular shoulders engaging the sections. In such case used to'exert atorsion or well as a pull or push.

The latching mechanisms of Fig. 10 may.be used in the telescoping stickof Figs. 4l to 3 or that of Fig. 9.

the sections can be a twist onv a tool, as

for slidably receiving the sections are pushed toward It will thus beobserved that I have invented a j telescoping tool for use on livetransmission lines,

" which isv adapted to be collapsed to a minimum length or extended toprovide an insulating pole All of the exposed parts of the telescopingstick or pole are made of insulating material, and the stick is adaptedto have a high insulating value.' It has a high mechanical strength andmay be used with various types of tools for transmitting torsion, push,or pull, or combinations of these forces upon the tool and the deviceson which the tool works. I have found that the mechanical strength ofthe stick is high enough to use on hot wire clamps of all kinds and onvarioustypes of tools customarily employed on the end of a wooden orother insulating stick.

While I have illustrated a preferred embodiinside, adjacent the tionbetween the llarger of said ment of my invention, many modications maybe made without departing from the spirit of the invention, and I do notwish to be limited to the precise details of constructionA set forth,but desire to avail myself of all changes within the scope of theappended claims.

Having thus described-.my invention, what I claim as new and desire tosecure by LettersPatent of the United States is:

l. In a telescoping'tool for high tension lines, the combination oi' apair of telescoping sections, each of said sections comprisinginsulating tube, and one section sliding within the larger of saidsections being provided on its inside, adjacent the Joint .between saidsections, with an interlocking sleeve iixedly secured to said largersection,vand adapted to slidably receive the smaller of said sections,and a similar interlocking sleeve carried by the smaller section andxedly secured to the smaller section inside the larger section todetermine the extended position of said sections.

2. In a telescoping tool for the combination of a pair of telescopingsections, each of said sections comprising insulating tube, and onesection sliding within the other, the larger of said sections beingprovided on its inside, adjacent the joint between said sections, withan interlocking sleeve xedly secured to said larger section, and adaptedto slidablyreceive the smaller of said sections, and a similarinterloclcing sleeve carried by the smaller section and xedly secured tothe smaller section inside the larger section to determine the extendedposition of said sections, said interlocking sleeves being secured tothe tubular sections by means of transverse securing means located inapertures in the sleeves and tube 3. In a telescoping tool for hightension lines. the combination of apair of telescoping sections, each ofsaid tube, and one section sliding within the other, the larger of saidsections being provided'on its joint between said sections. with aninterlocking sleeve xedly secured to said larger section, and adapted toslidably receive the smaller of said sections, and a similar interhightension lines,

locking sleeve carried by the smaller section and to the smaller sectioninside they provided with axially extending shoulders engaging eachother and preventing the-relative rotasections in Onedirection.

4. In a telescoping tool forhlgh tension'lines. the combination of apair of telescoping section s, each of said sections comprisinginsulating tube, and one section sliding within"the other, the

` sections being provided on its inside, adjacent the-joint between saidsections. with an interlocking sleeve iixedly secured to said largersection, and adapted to slidably receive the smaller ofsaid sections,and a similar interlocking sleeve carriedby the iixedly secured to thesmaller section inside the larger section to determine the extended-position of said sections, said interlocking sleeves being providedwith axially extending portions and recesses fitting within each otherwhereby relative rotation between the .sections is prevented in eitherdirection. g

5. In a telescoping tool for high tension lines, the combination of apair of telescoping sections, each of said sectionsv comprisinginsulating tube, and one section sliding within the other, the

other, the

sections comprising insulating smaller section and the combination of apair of larger of said sections being provided on its inside-adjacentthe joint between said sections. with an interlocking sleeve iixedlysecured to said larger section, and adapted to slidably receive thesmaller oi said sections, and a similar interlocking sleeve carried bythe smaller section Vand flxedly secured to the smaller section insidethe larger section to determine the extended position of said sections,said smallerA section having a radially projecting latching memberlocated to engage the end of the larger section when said sections areextended.

6. In a telescoping tool for high tension lines, the combination-of apair of telescoping sections, each of said section-s comprisinginsulating tube, and one section sliding within the other,'the larger ofsaid sections being provided on its inside, adjacent the joint betweensaid sections, with an interlocking sleeve xedly secured to said largersection, and adapted to slidably receive the smaller of said sections,and a similar interlocking sleeve carried by the smaller section andixedly secured to the smaller section inside the larger section todetermine the extended position of said sections, said smaller sectionhaving a radially projecting latching member located to engage the endof the larger section when said sections are extended, and vresilientmeans urging said latching member into latching position.

'7. In a telescoping tool for high tension lines, the combination of apair of telescoping sections, each of said sections comprisinginsulating tube, and one section sliding within the other, the larger ofsaid sections being provided on its inside, adjacent the joint betweensaid sections, with an interlocking sleeve xedly Isecured to said largersection, and adapted to slidably receive the smaller of said sections,and a similar interlocking sleeve carried by larger section to tion ofsaid sections, said-smaller section having a radiallyl projectinglatching member located to engage the end of the largersection when saidsections are extended, said latching member being slidably mounted in atransverse tubular guide.

8. In a telescoping tool for high tensionl lines, telescoping sections,each of said sections comprising insulating tube, and one sectionsliding within the othe the larger of said sections being provided onits inside, adjacent the joint between said sections, with aninterlocking sleeve xedly secured to said larger section, and adapted toslidably receive the l smaller of said sections, and a similarinterlocking sleeve carried by the smaller section and xedly secured tothe smaller section inside the larger section to determine the extendedposition of said sections, said smaller section having a radiallyprojecting latching member located to engage the end of the largersection when said the smaller section and iixedly secured to the smallersection inside the determine the extended position of said sections,

of successively sections are extended, said latching member beingslidably mounted in a transverse tubular guide, and said latching memberhaving a transversely extending pin for limiting its outward movement.

9. In a telescoping tool for high tension lines, the combination of apair of telescoping sec tions, each of said sections comprisinginsulating tube, and one section sliding within the other, the larger ofsaid sections being provided on its inside, adjacent the joint betweensaid sections, with an interlocking sleeve flxedly secured to saidlarger section, and adapted to slidably receive the'smaller of saidsections, and a similar interlocking sleeve carried by thesmaller-section and fixedly' secured tothe smaller section inside thelarger section to determine the extended posisaid smaller section havinga radially projecting latching member located to engage the end of thelarger section when said sections are extended, said latching memberbeing slidably mounted in a transverse tubular guide, and said latchingmember having a transversely extending pin for limiting its outwardmovement, said guide having a slot for receiving said pin to preventrotation of said latching member.

10. In a telescoping insulating stick for manipseries, with latchingmeans of insulating material operating between said sectionsfor securingsaid sections in-extendedposition, and insulating means carried by thesections for preventing relative rotation between the successivesections, and an electrical tool carried by one of the insulating stickand adapted to be actuated in a rotary or longitudinal direction by saidstick.

11. In a telescoping insulating stick ofvmanipulation of energizedequipment by means oi' the application of rotationor a push or pull, thecombination of a plurality of tubular sections of electrical insulatingmaterial, said sections being smaller size, and said sections beingslidably mounted with respect to each other in a series, means forclosing the endmost sections of said stick including an electricalv toolcarried by an end of the insulting stick and adapted to be yactuated ina rotary or longitudinal direction by said stick, and insulating meanscarried by said sections and located at the ends of the sections whererelative sliding movement occurs, comprising an insulating. vmember1ocated inside the end portion of, the section and adapted to engage apart carried by the end of ,the larger section to prevent and rotativemovement between the sections.

DAVID C. HUBBARD.

relative longitudinal

